EMS和NMS的区别

1.元素管理系统(EMS)：
网元管理系统(EMS)，顾名思义，是一种一般用于管理所有网元的软件工具。这里的元素代表节点，即计算机、路由器等设备。

2. 网络管理系统(NMS)：
网络管理系统(NMS)，顾名思义，是一种软件工具，通常用于管理和控制网络，即互连节点。

EMS和NMS的区别：

EMS	NMS
EMS usually manages single element or group of similar elements. Elements simply refers to node.	NMS usually manages more than one network i.e. multiple networks. Network simply refers to interconnected nodes.
EMS does not able to understand communication relationship among devices or elements.	NMS has ability to better understand communication and relationship among devices or elements.
EMS only have detail about complicated parts of single element.	NMS have detail about complicated parts of all elements.
EMS does not have any capability to manage different types of nodes or elements that have different functions, different nature.	NMS have capability to manage different types of nodes or elements that have different functions, different nature.
EMS can have access to complete management information content of all network elements within its domain or network.	NMS are not allowed to have access to complete management information content of all network elements within its domains or networks.
EMS cannot contain any NMS.	NMS can contain many EMS and can also manage them.
Protocols used to support management are SNMP, CORBA, XML, etc.	Protocols used to support management are SNMP, JMX, etc.
EMS does not monitor interconnection or connecting links between elements.	NMS monitors interconnection or connecting links between elements.
It does not report any fault or problems occurring at different nodes within network.	It reports all fault or problems occurring at different nodes or elements within network.
EMS cannot identify faults at different nodes and therefore cannot predict how fault is affecting communication link leading to non-functioning of whole network.	NMS can identify faults at different nodes and therefore can predict how fault is affecting communication link leading to non-functioning of whole network.